Taper-boring machine.



R. R. KUSS.

TAPER BORING MACHINE.

APPLICATION FILED MAY 18. 1909.

962,84:8 Patented June 28, 1910.

11 10 1&1. 4 W v H iiiiiiihmun 5 r 1 3 J I, H K 711 I 1 mum in 25 gym? 122 i WW'Q EEHN INVENTOR WITNESSES;

RUDOLF R. Kuss RUDOLF KUSS, OF LAMAR, IDAHO.

TAPER-BORING MACHINE.

Specification of Letters Patent.

Patented June 28, 1910.

Application filed May 18, 1309. Serial 170. 498,792.

To all whom it may concern:

Be it known that I, RUDoLF B. KUss, citizen of the United States,residing at De Lamar, in the county of Owyhee and State of Idaho, haveinvented new and useful Improvements in Taper-Boring Machines, of whichthe following is a specification.

This invention relates to a taper boring machine.

The object of this invention is to provide a simple, cheap, practicalmachine which will bore either a straight or a tapered hole; or a partlystraight and partly tapered hole; or the reverse; and is particularlydesigned for use in setting axle boxes on hubs.

The invention consists of the parts and the construction and combinationof parts as hereinafter more fully described and claimed, havingreference to the accompanying drawings, in which Figure l is a sideelevation of the invention with parts broken away. Fig. 2 is a planview. Fig. 3 is a plan view of the revoluble disk, showing the stemeccentrically adjusted. Fig. 4 is an inverted plan view. Fig. 5 is asectional view showing the stem in position for boring a tapered hole.

In the drawings, A is a clamp plate adapted to be clamped and secured tothe back face, here represented as the upper face, of the hub shown atB, by means of thumbscrews 2 mounted in downwardly projecting threadedmembers 3 on the clamp plate A. The body of this clamp plate A is in theform of a ring, and has an annular groove or channel 4 on its innerperiphery, in which the disk 5 is mounted to turn. The disk 5 has adiametral slot 6 to receive the upper portion of the stem 7 whichcarries the adjustable cutting bit 8. The opposite end of the stem ispivotally mounted in a bottom plate 9 secured to the opposite end of thehub.

10 are adjustment screws mounted on posts 11 on the disk 5, by which theposition of the stem 7 in the slot 6 may be regulated, so that the stem7 may be supported at an incline to the hub and made to move in theplane of a cone, as shown in Fig. 5, or to stand parallel or concentricwith the hub axis, as in Fig. 1; all as will be more fully describedlater.

The upper portion of the stem 7 is rectangular in cross-section, and isprovided at its outer extremity with a handle or crank 12. The lowerportion of the stem 7 is threaded, as at 13, to engage with acorrespondingly threaded nut 14 and to allow for adjustment to diiferentlengths of hub. This nut 14 is of hexagonal form and tapered in suchmanner as to allow eccentric motion of the stem 7 without binding in thesocket 15 of the lower clamp plate 9; the nut 14 fitting in acorresponding socket in plate 9 and held against rotation. A guard plate17 is provided on the plate 9 to retain the nut la in place, and is cutaway at 18 to allow the portion 13 of the stem to feed through. Plate 17is pivoted to plate 9 at one end, at 19, so that access may be had tothe nut 14. A slot 20 on the outer end of the plate 17 is adapted toengage with a pin 21 to retain it in its closed position. The clampplate 9 is provided with thumb-screws v 22 by which it is rigidlysecured to the under side of the hub B.

A knife blade or bit 8 is adjustably mounted in the stem 7 at a pointadjacent to the threaded portion 13. This blade or bit may be of anysuitable construction, but is here shown as consisting of the style ofblade used in the ordinary extension bit, and is held in position in thestem 7 by means of a wedge 24L and tapered screw 25, and is adapted tobe adjusted so that any desired length of projection beyond the face ofthe stem 7 can be obtained.

The revoluble disk 5 is retained in place by tap screws and washers 26,the washers being cut on one side to allow the disk 5 to be removed andreplaced by loosening the screws and turning the washers 26 to theproper position.

In operation, the hub B is previously bored to permit of the stem 7being passed therethrough. The clamp 9 is then placed in posit-ion onthe lower side of the hub, and the stem 7 inserted therein and throughthe bore and screwed into the nut 14. The knife blade or cutter 8 isthen adjusted on the stem 7, with a portion projecting beyond the faceof the stem a distance depending on the width or character of thedesired cut. The clamp plate A is then placed over the upper end of thestem 7, which latter is inserted through the slot 6 in the disk 5; disk5 being retained in and carried by plate A which is adjusted to theproper position on, and secured to the hub B. The stem 7 is thenadjusted in the disk 5 by means of the set screws 10, and the crank 12then placed thereon. If it is desired simply to enlarge the cylindricalbore previously cut, the stem 7 is adjusted centrally of the disk 5, andthe blade 8 projected the required length and locked. By rotating thecrank 12, the stem 7 will be revolved and turned in the nut 14: in suchmanner as to give a downward pull to the knife 8, thus causing thelatter to ream out the inside of the hub. In this manner the requiredwidth and depth of straight bore can be obtained. If it is desired tocut a tapered bore, the stem 7 is set eccentric in the disk 5, as shownin Fig. 5, by loosening one set screw 10 and tightening the other. Whenthis is done, the disk 5 and stem 7 can be revolved by rotating thecrank 12, whereupon the stem will be given a gyratory motion about thefeed nut as a pivot. The socket bearing 15 of the nut 1 1 allows thestem 7 and disk 5 to be rotated freely. The wide radius of swing givento the stem 7 at the disk 5, together with the downward pull toward acentral point in the socket 15, causes the knife 8 to travel downwardwith it gradually decreasing radius, in such manner that the bore willbe tapered, as shown in Fig. 5. The set screws 10 must be sufficientlytight in their contact with the stem 7, so that there will be no lostmotion, but should be loose enough to let the stem slide in and outfreely. The feed is made automatic by the nut 14.

From the foregoing it will be seen that by adjusting the set screws 10in the revolving disk with the stem in the center, a straight hole willbe cut; by adjusting them so that the upper end of the stem is offcenter, a tapered hole will be cut.

The revolving disk or turntable, with the above adjustments, constitutethe essential features of the invention.

This machine is small, inexpensive, and extremely handy to shops.

lVhile I have shown the application of the invention to the cutting ofhubs, it is manifest that it is capable of use for various otherpurposes.

Having thus described my invention, what I claim and desire to secure byLetters Patent is 1. In a taper boring machine, the combination of afeed screw, a cutting member carried by the feed screw, a feed nut, witha suitable support for the latter engaged by the feed screw, a rotatablymounted disk with a suitable support therefor, through which disk theother end of the feed screw passes, and posts projecting from the disk,and adjustment screws mounted on the posts, said disk having a diametralslot and the upper end of the feed screw passing through said slot andbeing interposed between the adjustment screws whereby said feed screwmay be operatively supported at different angles.

2. A taper boring machine comprising a pair of adjustable clamp members,one of which carries a polygonal tapering nut, with means for preventingthe nut from turning but permitting it to rock in its support, a feedscrew engaging the nut, a cutting member carried by the feed screw, theother clamping plate having a radially slotted disk rotatably supportedthereon, posts projecting from the disk, adjustment screws mounted onthe posts and engaging opposite sides of the upper end of the feed screwwhereby said screw may be operatively supported at different angles,means for rotating the feed screw, and a guard plate below the nut andembracing the feed screw and retaining the nut in place.

3. A taper boring machine comprising a pair of adjustable clamp members,one of which carries a polygonal nut, with means for preventing the nutfrom turning but permitting it to rock in its support, a feed screwengaging the nut, a cutting member carried by the feed screw, the otherclamping plate having a radially slotted disk rotatably supportedthereon, said disk engageable with the free end of the feed screw, 7

means for rotating the feed screw, said means for supporting the feedscrew in the disk comprising opposed screw threaded members operative inthe line with the slot, and a guard plate underlying the nut andretaining the same in place, said guard plate being pivotally mounted atone end whereby it may be swung to one side to give access to the nut.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

RUDOLF R. KUSS. Witnesses:

ARCHIE BRAMHALL, KARL S. TWITCHELL.

